Bring text and example in line in undoing.asc

rmzelle · rmzelle · commit ca2be2415853 · 2015-07-14T08:44:53.000-04:00
Text uses "git add *", example "git add .".
diff --git a/book/02-git-basics/sections/undoing.asc b/book/02-git-basics/sections/undoing.asc
@@ -42,7 +42,7 @@ The `git status` command reminds you:
 
 [source,console]
 ----
-$ git add .
+$ git add *
 $ git status
 On branch master
 Changes to be committed:
